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Journal Articles ChemSusChem Year : 2023

A comprehensive formulation of aqueous electrolytes for low‐temperature supercapacitors

Abstract

Supporting information for this article is given via a link at the end of the document. Safer-by-design and sustainable energy storage devices are envisioned as among the required 2.0 solutions to satisfy the fastgrowing energy demands. Responding to this evolution cannot be freed from a global and synergetic approach to design the requisite electrolytes taking into account the toxicity, the eco-compatibility and the cost of their constituents. An unprecedented strategy was performed targeting low temperature applications, a non-toxic and cost-efficient eutectic system LiNO3 in water with 1,3-propylene glycol as co-solvent was concomitantly selected to design a ternary electrolyte with a wide liquid range. By using this electrolyte in an electrostatic double-layer capacitor (EDLC), the operating voltage of the device reaches an optimum of 2.0 V at-40 °C over more than 100 h of floating. Moreover, after being set up at 20 °C, the temperature resilience of the capacitance is near total, demonstrating thus a promising feature related to the suitable thermal and electrochemical behaviours of the tested EDLC devices.
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Dates and versions

hal-04034782 , version 1 (17-03-2023)

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Guillaume Ah-Lung, Benjamin Flamme, Manuel Maréchal, Fouad Ghamouss, Johan Jacquemin. A comprehensive formulation of aqueous electrolytes for low‐temperature supercapacitors. ChemSusChem, 2023, 16, pp.e202202323. ⟨10.1002/cssc.202202323⟩. ⟨hal-04034782⟩
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